【摘要】 现代大型门户信息系统普遍具有数据类型繁多,系统结构复杂等特点,这一系列特点都给系统的统一检索带来了困难。而大型企业的门户信息系统更是因为其复杂的业务流程而存储了大量的数字文档和多媒体资料。这其中都包含了海量的数据与信息。本文详细探讨了目前几种流行的数据检索方式,并针对大型企业门户信息系统的特点,设计了一种能够实现各种检索服务的统一检索平台。该平台集子系统检索、元数据检索与全文检索于一身,可以满足大型企业门户信息系统中各种检索需求。并且,该系统中采用了新的消重机制,大大减少了由于重复收录资料或文档而造成的信息冗余。目前,该平台已经成功应用于南水北调中线干线建管信息系统。更多还原

【Abstract】 There are many problems like various data types and complicated structures in modern big portal system,and these all make it difficult to create a union search platform for the system.Especially for sizeable enterprise,there are more digital documents and multimedia resources being stored.They contain large scale data and information.A few popular ways of metadata retrieval and full-text retrieval are introduced in this paper.And according to the specialty of sizeable enterprise portal system,a platform of u-nion search is designed to meet the needs of every retrieval service.The function of duplication-elimination is introduced to the sys-tem to help reducing the redundancies of the information caused by repeatedly information collection.Now,this platform is used in South-to-North water diversion construction management system.更多还原